Keep the engine breathing right and the fuel trims accurate with the Standard Ignition Mass Air Flow Sensor MAS0189. This mass air flow sensor measures the air entering the intake and reports it to the engine control module so it can calculate the correct amount of fuel to inject. It's a direct-fit replacement for the listed Lexus and Toyota applications below.
- Air metering: Measures incoming intake air and signals the engine control module for proper fuel metering.
- Direct-fit replacement: Designed to replace the original mass air flow sensor on the listed applications.
- Signs it may need replacing: Rough idle, hesitation, stalling, poor fuel economy, or a check engine light — if a failed MAF sensor is the cause, this part replaces it.
Fitment: 1997-2001 Lexus ES300 · 1997-1999 Toyota Avalon · 1997-1998 Toyota Camry · 1998-1999 Lexus GS300 · 1998-2000 Lexus GS400 · 1998-2000 Lexus LS400 · 1998-2000 Lexus SC300 · 1998-2000 Lexus SC400 · 1998-1999 Toyota Sienna · 1999-2003 Toyota Solara. See the Buyer's Guide tab for the full list.
Manufacturer part number MAS0189.
Frequently Asked Questions
What does this mass air flow sensor do?
It measures the air entering the intake and sends that signal to the engine control module so it can calculate the correct amount of fuel to inject.
Will the MAS0189 fit my vehicle?
It's a direct-fit replacement for the listed Lexus ES300, GS300, GS400, LS400, SC300, SC400 and Toyota Avalon, Camry, Sienna and Solara applications. Confirm your year and model in the Buyer's Guide.
What are the signs of a failing MAF sensor?
Rough idle, hesitation, stalling, poor fuel economy, or an illuminated check engine light can be signs. Diagnose the cause before replacing, since these symptoms have other possible sources.
Will replacing this sensor fix my check engine light?
If a failed mass air flow sensor is the cause, replacing it addresses that. Other components can trigger the same symptoms, so diagnose before ordering.
What is the manufacturer part number?
This is Standard Ignition manufacturer part number MAS0189.
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